Abstract: A multiple catheter assembly including first and second catheters. The first catheter includes a first catheter outer surface defining a first lumen, a first distal end terminating in a first distal tip, and a first transition region. The second catheter includes a second catheter outer surface defining a second lumen, a second distal end terminating in a second distal tip, and a second transition region. At least a portion of each of the first and second catheters resides in a cannulating portion. The first and second transition regions of the first and second catheters transition cross sections of the first and second catheter outer surfaces at the first and second distal tips to cross sections of the first and second catheter outer surfaces in the cannulating portion. In exemplary embodiments, the portions of each of the first and second catheters in the cannulating portion are releasably bonded to one another.

Abstract: A co-axial catheter assembly (100), including a first lumen (110) having a first distal end (114) and a first proximal end (112), and a second lumen (120) having a second distal end (124) and a second proximal end (122). The second lumen (120) extends co-axially with the first lumen (110), wherein the second lumen is at least partially disposed within the first lumen and the second distal end extends distally of the first distal end. A method of manufacturing the catheter is also disclosed.

Abstract: A method for inserting a multiple catheter assembly into a patient. The assembly includes a first catheter which includes a first distal end region, a first outer surface defining a first lumen, and a first transition region transitioning cross sections of the first outer surface and the first lumen. A second catheter includes a second distal end region, a second outer surface defining a second lumen, and a second transition region transitioning cross sections of the second outer surface and the second lumen. The outer surfaces of the first and second catheters are releasably joined by a splittable bond for allowing first and second distal tips of the assembly to be at least partially longitudinally split from each other. The method includes steps of separating the first and second distal end regions, and inserting the first and second distal tips through an incision and into an area to be catheterized.